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Octane Number Conversion


In the USA, the octane numbers are calculated different from Europe.

In numbers that means:

Euro 91 octane = US 86,8 octane
Euro 95 octane = US 90 octane
Euro 98 octane = US 93 octane

Source:
Shell Deutschland Schmierstoff GmbH
Anwendungstechnik Schmierstofftechnik
Suhrenkamp 71-77
22284 Hamburg
Germany